1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
|
-- source include/have_innodb.inc
# Can't test this with embedded server
-- source include/not_embedded.inc
connect (con1,localhost,root,,);
connect (con2,localhost,root,,);
--disable_warnings
drop table if exists t1,t2;
--enable_warnings
#
# Testing of FOR UPDATE
#
connection con1;
create table t1 (id integer, x integer) engine=INNODB;
insert into t1 values(0, 0);
set autocommit=0;
SELECT * from t1 where id = 0 FOR UPDATE;
connection con2;
set autocommit=0;
# The following query should hang because con1 is locking the page
--send
update t1 set x=2 where id = 0;
--sleep 2
connection con1;
update t1 set x=1 where id = 0;
select * from t1;
commit;
connection con2;
reap;
commit;
connection con1;
select * from t1;
commit;
drop table t1;
#
# Testing of FOR UPDATE
#
connection con1;
create table t1 (id integer, x integer) engine=INNODB;
create table t2 (b integer, a integer) engine=INNODB;
insert into t1 values(0, 0), (300, 300);
insert into t2 values(0, 10), (1, 20), (2, 30);
commit;
set autocommit=0;
select * from t2;
update t2 set a=100 where b=(SELECT x from t1 where id = b FOR UPDATE);
select * from t2;
select * from t1;
connection con2;
set autocommit=0;
# The following query should hang because con1 is locking the page
--send
update t1 set x=2 where id = 0;
--sleep 2
connection con1;
update t1 set x=1 where id = 0;
select * from t1;
commit;
connection con2;
reap;
commit;
connection con1;
select * from t1;
commit;
drop table t1, t2;
create table t1 (id integer, x integer) engine=INNODB;
create table t2 (b integer, a integer) engine=INNODB;
insert into t1 values(0, 0), (300, 300);
insert into t2 values(0, 0), (1, 20), (2, 30);
commit;
connection con1;
select a,b from t2 UNION SELECT id, x from t1 FOR UPDATE;
select * from t2;
select * from t1;
connection con2;
# The following query should hang because con1 is locking the page
update t2 set a=2 where b = 0;
select * from t2;
--send
update t1 set x=2 where id = 0;
--sleep 2
connection con1;
update t1 set x=1 where id = 0;
select * from t1;
commit;
connection con2;
reap;
commit;
connection con1;
select * from t1;
commit;
drop table t1, t2;
# End of 4.1 tests
|
